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Finding the Fourth Proportional to 31,435, 47,152.50 and 9,547

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Solution

The fourth proportional to 31,435, 47,152.50 and 9,547 is: 14,320.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,435 : 47,152.50 = 9,547 : x
  2. Step 2: Convert to fraction form
    31,435/47,152.50 = 9,547/x
  3. Step 3: Cross multiply
    31,435x = 47,152.50 × 9,547
  4. Step 4: Simplify right side
    31,435x = 450,164,917.50
  5. Step 5: Solve for x
    x = 450,164,917.50/31,435
  6. Step 6: Final answer
    x = 14,320.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.